I have worked on towers on top of buildings and the the fact that it is on top of a building does not make it any better. You still look out and it is a long way down. For me, the feeling when I am on top of something is entirely different from being in a helicopter and looking down.
I also noticed in the photos the workers leaning out trying to gain a hold on the moving load suspended below the helicopter and it would not take much to be squashed between the load and a portion of the tower. When standing on top of a tower there is less maneuvering space to dodge a swinging load. Just not fun in my book.
